/* bzflag
 * Copyright (c) 1993-2020 Tim Riker
 *
 * This package is free software;  you can redistribute it and/or
 * modify it under the terms of the license found in the file
 * named COPYING that should have accompanied this file.
 *
 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

/*
* world event manager definitions
************************************
* right now this just does team flag capture events for world weps
* but it should be able to be expandable to store any type of event
* for anything that can be triggerd.
*/

#ifndef WORLD_EVENT_MANAGER_H
#define WORLD_EVENT_MANAGER_H

#include <map>
#include <vector>
#include <algorithm>

#include "bzfsAPI.h"

// event handler callback
class bz_EventHandler
{
public:
    bz_Plugin *plugin;
    virtual ~bz_EventHandler()
    {
        plugin = NULL;
    }
    virtual void process ( bz_EventData *eventData )
    {
        if (plugin)
            plugin->Event(eventData);
    }

    std::vector<bz_eEventType> HandledEvents;

    bool HasEvent( bz_eEventType evt)
    {
        return std::find(HandledEvents.begin(),HandledEvents.end(),evt) != HandledEvents.end();
    }

    void AddEvent( bz_eEventType evt )
    {
        if (std::find(HandledEvents.begin(),HandledEvents.end(),evt) == HandledEvents.end())
            HandledEvents.push_back(evt);
    }

    void RemoveEvent( bz_eEventType evt )
    {
        std::vector<bz_eEventType>::iterator itr = std::find(HandledEvents.begin(),HandledEvents.end(),evt);

        if ( itr!= HandledEvents.end())
            HandledEvents.erase(itr);
    }
};

typedef std::vector<bz_EventHandler*> tvEventList;

class WorldEventManager
{
public:
    WorldEventManager();
    ~WorldEventManager();

    void addEvent ( bz_eEventType eventType, bz_EventHandler* theEvent );
    void removeEvent ( bz_eEventType eventType, bz_EventHandler* theEvent );
    bool removeHandler ( bz_EventHandler* theEvent );

    void callEvents ( bz_eEventType eventType, bz_EventData   *eventData );
    void callEvents ( bz_EventData    *eventData );

private:
    tvEventList eventList;

protected:

    void processPending();

    tvEventList pendingAdds;
    tvEventList pendingRemovals;
};

extern WorldEventManager    worldEventManager;

bool RegisterEvent ( bz_eEventType eventType, bz_Plugin* plugin );
bool RemoveEvent ( bz_eEventType eventType, bz_Plugin* plugin );
bool FlushEvents(bz_Plugin* plugin);

#endif // WORLD_EVENT_MANAGER_H


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